Improvement in combination-locks



2 Sheet s-Sheet 1.

G. WINTER.

' COMBINATION LOCKS.

Patented Aug.29,1876.

",PETERS, PHUTO-LITHOGRAPHER, WASHINGTON, D C.

ZSheets-Sheet 2. G. WINTER.

' COMBINATION LOCKS. N0.181,756. Patented Aug. 29,1876.

f OFFICE.

tEoseE wmcnne, .on-rtorpcounrr, .YIRGINIA. 1

Specification forming part of Letters Patent No. 181,766, dated August29, 1876} application filed March 2, 1876.

To all whom it may concern:

Be it known that'I, GEORGE WINTER, of the county of Floyd and State ofVirginia, have invented a new and useful Improvement in Door-Locks,which improvement is fully set forth in the followingspecification,reference being had to the accompanying drawings. I

I In this invention the bolt is locked by a series of sliding dogs ortumblers, provided with semicircular grooves, to receive rotating pins,having semi-cylindrical portions.

When the pins are adjusted in one position the dogs may be raisedsimultaneously out of the notches in the bolt, thus allowing the latterto be withdrawn into the case butwhen adjusted in another position, thedogs are held locked, the semi-cylindrical portions of the pins in suchcase entering the grooves in the dogs. The position of the pins isindicated by a series of fingers pointing to numerals inscribed on theface of the lock.

Referring to the drawing, Figure 1 is a plan view of the lock with oneside removed, and the bolt shot and the dogs or tumblers engagedtherewith. Fig. 2 is a similar view, showing the bolt wi hdrawn, and thedogs or tumblers disengaged from it. The upper portion of the lock-caseis broken away. Fig. 3 is a plan view of the lock. Fig. 3 is an endview. Figs. 4. and 5 are detail views of a locking pin and dog,respectively.

It should be understood in the outset that the pins for locking the dogsthat engage with the sliding bolt are made of such length as to projectfrom opposite sides of the lock, so that the combination on which thetumblers are set is indicated on both sides of the lock. The lock is,therefore, adapted to be operated from either side of a door, whenproperly attached thereto.

The bar D, by which all the dogs or tumblers B are simultaneouslyraised, is operated by a key, A, and the sliding locking-bolt X byanother key, B, Fig. 3. The dogs or tumblers B consist of a series ofstraight bars, which are arranged parallel in grooves of the lock-case,perpendicular to the bolt X. Each dog has two half-round transversegrooves, A,

and is recessed at the upper end, Fig. 5, to

in Fig. 2.

The dogs are locked in their places-11. 0., held engaged with thenotches of the bolt-by means of pins 0. These pins are cylindrical inform, and'each cut out on one side to the extent of one-half theirdiameter, as at c, Fig. 4.

When inserted through the case of the lock the solid semi-cylindricalportion e coincides in position with the semicircular grooves in thedogs B. It will hence be perceived that when the pins are all adjusted,as shown in Fig. 1, the dogs are locked in place; but by turning themhalf round, the part a would free the grooves A, and allow the dogs tobe moved up, and the bolt withdrawn, as shown in Fig. 2. In other words,the dogs are locked or free to move, according as the semi-cylindrioalportion 6 of the same is turned into or out of the corresponding groovesA in the dogs B.

A circular rib on the pins prevents their withdrawal from the lock-case,and the outward movement of the bolt X is limited by a stop-pin,f.

The means of determining when all the pins 0 are adjusted properly toallow the free movement of the dogs and the withdrawal of the bolt arethe fingers i, Fig. 3, which project radially from the pins. When thesefingers point to certain numerals inscribed in a circle on the faces orsides of the lock-case, the dogs may be disengaged from the bolt.

In this instance they are set on the following combination: 0! the uppier i'ow of nu mb ers indicating the pins, and the lower row the numberson the circle.

When any of the fingers'i point to any other number than those aboveindicated, the

bar D cannot be raised, and hence the dogs or tumblers hold the boltshot. The combination may be changed by changing-0f the and thesemicircular grooves, the bar D, and

fingers i in the pins 0, so as to point to other notched bolt X, asshown and described, t

numbers. operate as specified. v

Having thus described my invention, what This 22d day of February, 1876.

I claim as new, and desire to secure by Let'- ters Patent, is- GEORGEWINTER.

The combination of the pins, provided with Witnesses:

radial fingers, and having a semi-cylindrical BALLARD O. DOBBINS, 1

portion, e, the sliding dogs having notches, GEORGE W. DIOKERSON.

